Researchers discover security flaws in Telegram encryption protocol


Researchers from the University of London’s Royal Holloway have discovered several flaws in the MTProto protocol used by the popular encrypted messaging app Telegram.

While end-to-end encryption (E2EE) is available in one-on-one chats, the MTProto protocol is used in the service’s group chats (also known as cloud chats) as well as when users don’t opt-in for E2EE. MTProto is Telegram’s version of transport level security (TLS) which is used to secure data in transit and to protect users from man-in-the middle attacks.


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